Drill-head.



. E. HENDRICKS. 53ML HEAD APFLIOA'l'ON FILED SEPT. 10, 19GB.

Patented Mar. 16. 1909.

*wim um r I Chienne:

ivision in a merchant able form, of a device of SlGNOR OF ONE-THIRD T0 ANDREW L LOVE AND ONE-THIRD TO LEOPOLD UEDEL, OF OTTUMWA.W IOWA,

DRILIrHEAD.

Specification of Letten Patent,

Patented March 1 6, 1909.

i'o all 'whom it may concern:

Be it knoun that L Osc/in E. I-inivnnnifxs, a citizen of the United States, residing at Ottum'w a, in the county of Wapello and State of Iona., have invented a new and useful Drill-Head, -of which the following is a specification. l

The improved drill head herein described, is of the class designed and adapted primarily, though not exclusively, for use in connection v. 1th an auger of the sort used in coal mining operations The objects of the invention are, the vprothe class above mentioned, which shall be inexpensive to manufacture; facile in operation and devoid of complicated parts; the provision in a novel form, of a drill head which may be readily attached to any auger of standard make, and speedily removed therefrom; other and further objects being made manifest hereinafter, as the c .onstrlic-V tion and operation of the device is unfolded in 'the subsequent description.

The invention consists in the novel construction and arrangement ot'parts hereinafterl described, delineated in the accompanying'r drawings, and intrticularlypointed out in the appended claims, it being understood that divers changes in the form, proportions, size and minor details of thc structure may be Inadew` ithout departing from the spirit or Vwhich it is used,

sacrificing any of the advantages of tite invention.

Similar numerals oi' reference are employed to indicate corresponding parts throughout. the several figures of tht` drawings ln the accompauyinpr drarI ings Figure t is a top plan of thc stock l. Fig, 2 is a l'ront elevation of thc completo dcvicc. Fig. is a bottom plan.

[n carrying out my invention, l provide a stock l which may bc ot' an)` forni, preferably however, it is elliptical in transverse section, as shown, thc stock bonn;i upul'ardly split iront its lower terminal to form bifuroating arms 2. Th1-sc nrms 2 nrc lhttttntd, I bent outward from the stock l and disposed in oppositcly inclined planes as shown ini ltig. 2. 'l`lic terminals ol' tbc arms i? arci slotted at and in the slots It nro mounted i disks which may bc of any shape. l prcfor, howt for, that they talt'il thc ['orin of, rotatable dtmbhbconvcx disks 4, mounted fit-their centers as shown, upon the pintle (i.

The line 5 idong which the, stock l is u wardly split, should assume an angle ot' su stantially forty--ivo degrees to the shorter axis 0f the cross-sccti01ml ellipse, as shown in Fig. 3, this instruction serving to make the attachment between the arms 2 and the `stock l more strong than any other that l am aware of.

It is intended that this invention shalt be capable'y of detachment f rom thc`au er ie ith in order that a sin e auger may be used with several drill heails of the sort described, and to'facilitate the above arrangement., the` top oi the stock carries an internal,

'Jil

longitudinally disposed slot 7. This slot 7 is disposed in the longer axis of the cross-sectional ellipse and a. set screw 8 is arranged in substantiall the shorter axis of the cross-sectional el ipse, thus dis posing thc head of the set-screw S within thi' circle described hy the endsof the longo: axis of the cross sectional ellipse, and securt from blows or friction which would tend to loosen the set-screw in its hold upon the auger by which my invention is carried.

Having thus described my invention, what I claim as new'v and desire to protect by itch tcis-Patent, isz-- 1. In a device oithc class described, a stock elliptical in cross section, the said stock being upwardly split from the lower terminal at an angle of suhstantiall forty tive degrees to the minor axis of t e ort sectional ellipse to form biiurcatin'g artis, the said arms being outwardly iiexed from the stock; cutting: means carried by the terminals of the ai 2. ln a dcvicc or Liic class described, a stock elliptical in cross section, and havin in its u )per face a slot disposed in the long',` t axis oll the cross sectional ciiipsc; a set,- screw mountcd in thc stock, arranged to cot'ipcratc with the slot, and disposed in the shorter axis of thc cross sectioned f-ilipse; nrins projecting laterally from the lof/e it'i terminal ol the stock, cutting means tarriwt by the terminals of the arms.

ln testimony that l claim tiuforegoing is my own, l have hereto aliiwtl my sipjiiatno in the presence of two witucsst-s,

USVA it itl. lililfiltili 'liti lilfitnesscs J. d. Snrrn, A. li. liovrz. 

